Sanding and polishing machine.



P ATENTED JAN. 16, 1906.

DB LASKI T. ULEMONS. SANDING AND POLISHING MACHINE.

APPLICATION FILED MAY 2. 1905.

2 SHEETS- 8111331 1.

No. 810,037. PATENTED JAN. 16, 1906.

DB LASKI T. OLBMONS. SANDING AND POLISHING MACHINE.

APPLICATION FILED MAY 2.1905.

2 SHEETS-SHEET 2.

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@QZM QM QMA attozwug ..UNITED STATES PATENT OFFICE.

DE LASKI T. CLEMONS, OF HORNELLSVILLE, NEW YORK, ASSIGNOR OF Tl/VO-TI-IIRDS TO J. PEYTRENET AND J. F. RICHARDSON, OF HORNELLS- VILLE, NEW YORK.

SANDING AND POLISHING MACHINE.

Specification of Letters Patent.

Patented Jan. 16, 1906.

' a citizen of the United States, residing at Hornellsville, in the county of Steuben and State of New York, have invented or discovered certain new and useful Improvements in Sand ing and Polishing Machines, of which the following is a specification, reference being had therein to the accompanying drawings.

This invention relates to a sanding or polishing machine of that class which is adapted to be moved about by the operator over a surface which is to rubbed down or polished and in which the ,abrading-surface is driven by power, the'invention having for its object to provide atool or machine of the class referred to which is adapted for polishing or rubbing down either flat or curved surfaces, and is particularly well adapted for smoothing and rounding the corners of tables or the surfaces of other articles to be polished in a convenient, rapid, and efficient manner.

To this end the invention in its preferredform comprises a frame consisting of two parts havinga hinged connection and an endless polishing or sanding belt running over two drums or rollers, one of which is mounted in each of the parts of the hinged frame, one of said drums or rollers being driven by power and the other running by traction from the polishing or sanding belt. To keep the said sandingbelt taut, springs connected to the two parts of the frame and bearing upon the hinged or jointed portion of the frame or on the pivotbolts are provided, said springs hearing or pressing down on the pivoted or middle portion of the frame in such a manner as to have a tendency to keep the polishing or abrading belt taut.

1n the accompanying drawings, Figure 1 is a plan view of the improved power-driven hand-sander, and Fig. 2 is a side view thereof. Fig. 3 isa side view, partly in longitudinal section on line 3 3, Fig. 1, of the improved sander, showing the manner of its use in sanding an edge of a table-top. Fig. 4 is a detail sectional view of part of the driving mechanism of the machine. Fig. 5 is a detail perspective View of one form of'pad which may be used with the machine, and Fig. 6 shows one of the pad-holding bars.

Referring to the drawings, the frame of the machine consists of two parts, each of which comprises the side bars 12 and the cross-bars 13, the two parts of the frame being jointed together by pivot-bolts 14, on which rest springs 15, connected to the two-part frame by winged nuts 16 and eye-screws 17, pivoted on pins or bolts 18, attached to the side bars of the frame, the said winged nuts being adjustable to vary the tension of the said springs. The springs are sufficiently stiifso that when the winged nuts are properly adjusted they normally hold the two parts of the frame in approximate extended alinement with each other, but will yield when it is desired to bend the frame in polishing rounded edges of tables or other articles to be polished or sanded. The frame is provided at its ends with handles 19, which are grasped by the attendant in moving the tool over the surfaces to be sanded or polished.

Mounted in each portion of the hinged or jointed frame is a drum or roller around which passes an endless sanding or abrading belt 20, which is normally held taut by the stress of the springs 15, bearing upon the pivotbolts 14:, joining the two portions of the frame. The drum or roller 21 is mounted on a shaft 22, provided with a bevel-gear 23, meshing with a similar bevel-gear 24: on a drivingshaft 25, which is to be driven from a flexible or jointed shaft 26, connected with the shaft 25 by a universal joint 27. The shaft 25 has its bearing in a journal-box and gear-casing 28, one portion of which is pivoted on a hub or boss 39 on the frame, so that the said journal-box and casing and the shaft 25 mounted therein may be turned in any desired direction relative to the tool, or, conversely, so that the tool may be freely moved relative to the vertical or horizontal position of said shaft 25. The second drum or roller 29 is driven by traction from the drum or roller 21 through the sanding or abrading belt 20.

In the use of the tool or sander the handles 19 are grasped by the operator and the polishing orabrading belt is pressed against the work or surfaces to be polished or sanded. If it be desired to polish or smooth off the rounded corners of a ,table or other flat surface, the workman can move the tool so that it will project partly over the flat surface of such article, or the article the edge of which is to be sanded or polished may be turned up at an angle, and by bearing upon the handles he can press down the ends of the yielding pivoted frame, so that it will bend against the stress of the springs 15, as shown in Fig. 3, in such a manner as to enable the abrading-belt to be bent partly around an edge or other portion to be rounded or polished.

The polishing machine or tool is preferably provided with pads which will bear against the polishing-belt in sanding or polishing flat surfaces; but in working altogether over the corners or edges of articles to be polished these pads might be dispensed with, although the form of pad 30 shown in Fig. 3 will preferably be used as a guide or support both for the belt and the tool or machine, such pad being rigidly attached to the frame by arms or brackets 31. In Fig. 2 another form of pad 32 is illustrated, such pad being connected with the two parts of the hinged frame by arms 33, attached to cross-bars 3a, resting in grooves or recesses 35 in the top of the pad and in which grooves or recesses such crossbars fit somewhat tightly, but not so tightly but that the pad may be disengaged therefrom when it is desired to remove it for the purpose of substituting another pad-such, for example, as the pad 36, of somewhat different shape-or for the purpose of using the tool or machine without any pad.

For the purpose of providing means whereby the endless belt 20 may be placed in position on the drums or rollers 21 and 29, the handles 19 preferably have a jointed or pivoted connection at one side with the side pieces of the frame and are attached to the opposite side pieces by bolts 37, having winged nuts 38, which will afford a convenient means for detachably securing the handles in place in such a manner that they may be disconnected from the side pieces and turned up (see dotted lines, Fig. 2) when an abrading-belt is to be removed or inserted in place.

By the use of this improved sanding or polishing tool or machine considerable work in sanding or polishing rounded edges and other parts, heretofore usually requiring hand work, may be quickly and efliciently accomplished, thereby effecting a great saving in time and cost, while equally good, or even better, results will be secured than by handwork.

Other forms of pads than those herein shown and especially adapted for different kinds of work may be employed in connection with the improved sanding or polishing tool or machine, and variations in the details of construction may be made without departing from the spirit of the invention.

Having thus described my invention, I claim and desire to secure by Letters Patent-- 1. In a sanding or abrading tool or machine, the combination with a frame consisting of two parts having a yielding jointed connection, of a drum or roller mounted in each part of said frame, an endless abrading-belt passing about said drums or rollers, and poweroperated means for driving one of said drums or rollers to operate said belt.

2. A power-operated sanding or abrading tool or machine, comprising a frame consisting of two parts having a jointed or pivoted connection, combined with springs serving to hold the two portions of said frame in approximate alinement with each other, a drum or roller mounted in each portion of the said jointed or pivoted frame, an endless belt passing around said drums or rollers, and poweroperated means for driving one of said rollers.

'3. A power-operated sanding or abrading tool or machine, comprising a frame consisting of two parts having a jointed or pivoted connection, combined with springs serving to hold thetwo portions of said frame in approxi: mate alinement with each other, a drum'or roller mounted in each portion of the said jointed or pivoted frame, an endless belt passing around said drums or rollers, and a pad connected with said frame and adapted to press upon thebelt so as to hold the same against the surfaces to be sanded or polished.

4. In a sanding or abrading tool or machine, the combination with a frame, of drums or rollers, an endless abrading-belt passing about said drums or rollers, a shaft on which one of said drums or rollers is mounted, a bevel-gear on said shaft, a journal-box pivoted on said frame, and a driving-shaft journaled in said box and having a bevel-gear meshing with the first-named bevel-gear.

5. In a sanding or abrading tool or machine, the combination with a two-part frame having a yielding connection, of drums or rollers, an endless abrading belt passing about said drums or rollers, a shaft on which one of said drums or rollers is mounted, a bevel-gear on said shaft, a journal box pivoted on said frame, and a driving-shaft journaled in said box and having a bevel-gear meshing with the first-named bevel-gear.

In testimony whereof I affix my signature in presence of two witnesses.

DE LASKI T. CLEMONS- 

